Framing jack



D. P. QUINLIVAN Nov. 15, 1932.

FRAMING JACK Fiied Nov. 1:. 1929 2 Q- INV ENTO R 7 ATTORNEY Patented Nov. 15, 1932 DONALD r. QUINLIVAN,- or rnns io, eALIroRmA; 1

FRAMING .mcx

Application filed November 13, 1929. Serial- Zl I'o." 406,874.

My invention relates to a lifting jack and more specifically to a form of jack adapted to engage and lift theends of poles. In the business of constructing lines for telephone,

5 telegraph, power and similar purposes it is usual to distribute the poles along the right of way and then to frame them before erectingthem. To frame them in the parlance near the center point thereof. Arm 10has the outside end slightly curved" as shown to keep the pole from sliding therefrom while being raised.

The cog sector is engaged by a screw 12 having the end 13 formed to engage a ratchet wrench 21 so that the screw can be turned to move the sector to either raise or lower arm of that character of work means to cut the 10 put on cross arms, braces, and brackets which may be necessary to sustain the wires which are strung from pole to pole.

The object of my invention is the construction of a lifting jack which is light in weight so that it can readily be transported from place to place, which can be adjusted to be placed under the pole in position to lift the pole whenthe pole is lying on the earth, and which will remain as a rigid support at the elevation desired, within the limitations of the reach of the device. Another object is that there is less liability for workmen to be injured than by the present method of lifting the ends of the poles by hand power.

In the drawing accompanying this specification Fig. 1 shows the jack pole lying on the earth.

Fig. 2 shows the jack and pole in a position where the pole is lifted off the ground and is held in position for framing.

Fig. 3 shows an end view of the device.

Fig. 4 is a rear'view of a stop. Fig. 5 is a cross sectional View of an arm along section line 5-5 in Fig.2.

Referring to the drawing I have provided a base 6 havin at one end thereof an upright support 7 is shown the base is much longer proportionately than its width. A cog sector 8 is pivotally mounted on bearing 9 near the top. of upright support 7, said sector having attached thereto or formed integral therewith an arm 10 which extends approximately to the outside end of the base. As shown in the drawing this arm is preferably composed of two members, 101 and 102, which join at one end, the other ends being periphery of the sector and the other end ends of the post to the desired shape and to sliding it to the point desired. The positioned to lift a attached to the sector, one end near the It is noted that while the rotation of screw 12 will either raise or lower arm 10, the downwill not be sufliward pressure on the arm cient to turn the screw, tion the screw may be rigid in such position.

For the rolling off the arm 10 when in an elevated position I have used a stop 15 which is supported on arm 101 in the position desired. A recess 201 is formed in the base of stop 15, the recess being of a shape and size to loosely slide on the top of arm 101. A cross section view in Fig. 5 shows that the cross section is in the form of a T and stop 15 can be, positioned in engagement with arm v101 by passing it over the end of said arm, and by weight of the pole against the stop interlocks the stop with member 101, and thus forms a. rigid stop which prevents the pole from sliding further toward the cog sector.

WVh'en desired to lower the pole themovement of the screw is reversed from the move-. ment used to raise the pole, and when the pole so that in any posileft, the arm 10 is is resting on the ground the jack can be disengaged therefrom by pulling it from under the pole.

- purpose of keeping the pole from It is here noted that the device I have ini vented is adapted especially for raising the.v

ends of poles so they can be framed or otherwise worked with, and it is not intended as a jack for general purposes.

Having described my invention I claim:

A framing jack adapted to hole a pole for,

framing consisting of an elongated base, an upright post near one end of saidbase, an arm pivotally attached to the post and extending approximately laterally with said base, said arm terminating at the pivotal endv with'a cog sector mounted concentric with said pivoted arm, said am terminating at the other end with an upward curve, and having adjustable stop means attached thereto between the ends thereof, said stop means being curved and adapted with the end of the arm to grasp an approximately round object, the ends of the base and arm opposite the pivotal mounting being adapted to be positioned adjacent to each other, sothat said base and arm can be positioned under an object adjacent to the earth, and screw means adapted to cooperate with the cog sector to V j raise and lower said arm.

DONALD P. QUINLIVAN. 

